14-( )=12
17-( )=17
17-( )=8
16-( )=9
12-( )=4
19-( )=14
20-( )=17
13-( )=2
19-( )=16
19-( )=11
18-( )=15
15-( )=5
17-( )=16
18-( )=1
11-( )=0
13-( )=4
18-( )=17
16-( )=15
11-( )=4
14-( )=1
11-( )=10
15-( )=0
14-( )=13
14-( )=8
18-( )=0
16-( )=10
20-( )=8
11-( )=4
11-( )=6
18-( )=3
18-( )=16
19-( )=7
12-( )=3
16-( )=3
17-( )=17
20-( )=13
19-( )=8
20-( )=10
13-( )=7
18-( )=10
15-( )=15
11-( )=4
20-( )=11
19-( )=6
16-( )=3
19-( )=15
12-( )=10
15-( )=3
15-( )=10
13-( )=13